Here it is: the preferred edition of Windows for home desktop and mobile PCs. Windows Vista Home Premium delivers the productivity and entertainment that you need from your PC at home or on the go. It includes Windows Media Center, which helps you more easily enjoy your digital photos, TV, movies, and music. Plus, you'll have the peace of mind of knowing that your PC has a whole new level of security and reliability. All together, Windows Vista Home Premium redefines enjoyment in home computing. Windows Vista SP1 is an update to Windows Vista that addresses feedback from customers. In addition to previously released updates, SP1 will contain changes focused on addressing specific reliability and performance issues, supporting new types of hardware, and adding support for several emerging standards. SP1 also addresses some management, deployment, and support challenges.